Amphibious aerial vehicle

1. A UAV (unmanned aerial vehicle), which is characterized by comprising:

a plurality of lift propellers;

a cabin engaged with said plurality of lift propellers;

a water propulsion system engaged with the cabin to push the cabin in a forward direction when the cabin is at least partially immersed in water;

at least one water inlet engaged with the water propulsion system;

wherein the water propulsion system includes a motor, a water propeller and a cylinder;

wherein the cylinder is fixedly connected to the cabin; the cylinder is provided with an open end and a blocking end; the cylinder has an axis and said axis is parallel to a longitudinal axis of the cabin; and the open end of the cylinder faces a rear end of the UAV; the water inlet is positioned on a side wall of the cylinder;

wherein the motor is positioned inside the cylinder, and a body of the motor is fixedly connected with an inner wall of the cylinder; and

wherein the water propeller is positioned inside the cylinder and close to the open end of the cylinder, and the water propeller is connected with an output shaft of the motor.

2. The UAV according to claim 1 , which is characterized in that the motor is an electric motor.

3. The UAV according to claim 1 , which is characterized in that it also includes a rudder engaged with the water propulsion system, said rudder enables the travel direction to be changed when the cabin is partially immersed in water.

4. The UAV according to claim 3 , which is characterized in that the rudder has a vertically arranged sheet structure, and a top end and a bottom end of the sheet structure are hinged to the inner wall of the cylinder; wherein the rudder is positioned downstream of the water propeller and can rotate around a hinge point with the cylinder.

5. The UAV according to claim 1 , which is characterized in that the cabin is a cargo hold or a passenger cabin.